All experiments must have either a no-treatment control group or a placebo control group.

Name: All experiments must have either a no-treatment control group or a placebo control group.
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Not all experiments require a no-treatment control group or a placebo control group; the necessity depends on the nature of the experiment and the research question being addressed. Some experiments may use different types of controls or comparative groups based on the experimental design.

All Experiments Must Have Either a No-Treatment Control Group or a Placebo